Land by postcode · N area · N12
What the open records say about the N12 postcode district in Greater London: recent sales, planning designations and controls, and the council that decides applications. District-level facts to read before you sell or develop a plot in Barnet, London.
Residential sales recorded by HM Land Registry between 2024-08 and 2026-07. This is market context for the district, not a land valuation: what a plot is worth depends on what can be built on it, which these figures do not show.
Sales in 24 months
479
Median sale price
£534,000
Median £ per m² of floor area
£7,500
Median, last 12m vs prior 12m
+6.8%
£515,000 → £550,000
Mix of sales: 5% detached, 24% semi-detached, 21% terraced, 51% flats.
New-build sales 2023–2024: 18 of 563 (3%). A rough proxy for recent building activity: these are homes sold by builders, not development sites.
For each designation on the planning.data.gov.uk register, the share of the 698 live postcodes in N12 whose centroid falls inside it. This measures postcodes, not land area, and says nothing about any individual plot.
4 of 698 postcodes
Barnet
698 of 698 postcodes
3 separate directions recorded, each removing particular permitted development rights within a defined area.
No postcodes in N12 fall inside: National Landscape (AONB), National Park, Conservation Area.
Flood zones, tree preservation orders, local plan allocations, settlement boundaries and non-designated heritage are not included here and are checked in a full assessment.
1% of postcodes in N12 are inside the Green Belt, so Barnet, London has land both inside and outside it. Which side of the boundary a plot sits on determines whether the Green Belt tests apply to it at all.
100% of postcodes are covered by an Article 4 direction, which removes specific permitted development rights in that area, so changes that are automatic elsewhere need a planning application there.
These are district-level facts. The free assessment checks your actual boundary against the same registers and the local plan and tells you plainly what they mean for your plot.
Decided planning applications in N12 since 2021, from the council registers, grouped by the kind of scheme a landowner might be weighing up. Extensions, conditions and tree works are left out. Counts, not estimates.
Taken from the units table on the planning form itself, so this is homes actually created, not a reading of the description. 46 decided since 2021, 22 refused, typically 66 days to a decision.
13 of 46
approved, 28%
47% across London
30 homes approved of 116 applied for
Approved examples
99 Bow Lane London N12 0JL (2 new homes)
Conversion of the existing dwelling into 2no self-contained flats. Associated refuse/recycling storage and cycle parking
Approved 2024-05-14, Barnet ref 23/0417/FUL
938 High Road London N12 9RT (2 new homes)
Change of use from commercial, business and service use (Class E) to 2no. dwellinghouses (Class C3)
Approved 2024-03-14, Barnet ref 24/0217/PNE
Land West Of 5 Friern Park London N12 9DE (1 new home)
Erection of a three storey dwelling. Associated rear access, parking, amenity space, refuse and recycling and cycle storage
Approved 2024-12-27, Barnet ref 24/4229/FUL
By the kind of plot, from the wording of each proposal:
37 decided since 2021, 16 refused, typically 93 days to a decision
16 of 37
approved, 43%
43% across London
Approved examples
Land Rear Of 99 Friern Park London N12 9UD
Demolition of the existing garages and erection of a new single storey dwelling with basement level. Associated refuse/recycling, cycle stor...
Approved 2021-10-20, Barnet ref 21/3970/FUL
41 Lullington Garth London N12 7LT
Erection of a new two storey dwelling with rooms in the roofspace following demolition of the existing garages. Associated amenity space, st...
Approved 2021-10-19, Barnet ref 21/4323/FUL
Rear Of 21 Torrington Park London N12 9TA
Demolition of existing lock-up storage units and construction of a single-storey family dwelling with flat green roof, including amenity spa...
Approved 2022-03-31, Barnet ref 21/5514/FUL
7 decided since 2021, 1 refused, typically 56 days to a decision
5 of 7
approved, 71%
49% across London
Approved examples
80A Westbury Road London N12 7PD
Demolition of existing dwelling house and erection of a two storey dwelling with rooms in roofspace. Associated vehicular access and pedestr...
Approved 2021-08-27, Barnet ref 21/3680/FUL
1 Mayfield Avenue London N12 9JG
Demolition of the existing dwelling and erection of 2no two storey detached dwellings with rooms in the roofspace. Associated parking, refus...
Approved 2023-10-02, Barnet ref 21/4211/FUL
74 Hollickwood Avenue London N12 0LT
Demolition of detached dwellinghouse and erection of two semi-detached dwellinghouses. Provision of vehicular access to front to provide two...
Approved 2022-01-17, Barnet ref 21/6143/FUL
7 decided since 2021, 3 refused, typically 99 days to a decision
0 of 7
approved, 0%
45% across London
Also decided here: 25 applications for outbuildings, annexes or garden buildings, 20 approved, typically 59 days.
Decided planning applications (not extensions, conditions or tree works) in this postcode district from the councils' own registers, classified by the wording of each proposal. Counts, not estimates; where a class has fewer than three applications it is not shown.
Barnet covers 100% of the sampled postcodes in N12.
Draw your boundary, tell us what you own, and an architect checks it against these registers and the local plan. Free, no obligation, and you get a straight written answer.
It depends on where the plot sits, not on the district average. In N12, 1% of postcodes are in the Green Belt. On Green Belt or National Landscape plots a new home is the exception and needs a specific case; a replacement dwelling, a conversion or a modest extension is usually the realistic route there. Outside those designations the questions that decide it are whether the plot is inside or adjoining the settlement boundary in the local plan, whether it has its own road access, and what is next to it. A plot on the edge of a village or town with access has the best chance; an open field outside the settlement boundary rarely gets consent for housing whatever the market is doing.
Often, yes. 100% of postcodes in N12 are under an Article 4 direction (3 separate directions), which withdraws particular permitted development rights, so an outbuilding, extension or change of use that is automatic elsewhere needs an application there. Outside those areas, permitted development applies to houses and their gardens but not to agricultural land or paddocks, where a new building or a new use normally needs permission or prior approval.
Developers look at three things before they talk about price: whether the plot is outside the Green Belt and any National Landscape, whether it sits inside or beside the settlement boundary, and what finished homes sell for. In N12 the median sale is £534,000, and only 3% of 2023–2024 sales were new-build homes, so builders have been quiet here. A single plot usually goes to a local builder or a self-builder; a site for five or more homes attracts regional housebuilders, normally through an option or a conditional contract rather than an outright purchase, so the price you see quoted is not the price you receive.
There is no district figure for land, because a plot's value comes from what can be built on it, not from where it is. As a guide, a serviced plot with consent for one house commonly sells for around a third of the finished house value, which in N12 would be measured against a £534,000 median sale. The same plot without consent, or inside the Green Belt, is worth a small fraction of that, and a paddock with no realistic route to consent is worth agricultural or amenity value only. The free check tells you which of those your plot is before you talk to anyone about a price.
Three places: Barnet's local plan and its policies map for the settlement boundary and allocations, the council's planning register for what has been approved or refused on neighbouring land, and planning.data.gov.uk for the national designations. That is an evening's work if you know what you are looking for. The alternative is to draw your boundary on this site: an architect checks it against the same records and writes back within 48 hours with a plain answer, free and without obligation.
Computed from open-data records; district-level, not plot-level measurements. Sales: HM Land Registry Price Paid Data (2024-08-01 to 2026-07-31), © Crown copyright, Open Government Licence. Designations: planning.data.gov.uk (OGL), retrieved 2026-09-05; conservation areas and Article 4 directions are made locally and published on that national register. Postcode centroids: OS Code-Point Open 2026.3.0, contains OS data © Crown copyright and database right 2026. Place name is the most common post town in the sales records. Figures computed 2026-09-06.